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ATTO Disk Benchmark vs fio: catalog facts
ATTO Disk Benchmark	fio
Free Free download from ATTO.	Free Free and open source.
Windows	Linux, Command line
Free download from a storage hardware maker Measures both read and write performance	Highly configurable workloads through job files Many I/O engines for different storage paths
Little product detail on the vendor's pages Proprietary software	Steep learning curve for new users Command-line only, no built-in graphical interface
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.